I personally think they should take those punching things out of the night clubs.
A bunch of drunk guys competing over girls and you want them to what? to practice punching something as hard as they can?
I can't imagine how many fights these things have started.
But back to the question of is it accurate... You seem like an experienced fighter.
I will have 2 prototypes in a couple of weeks to test out.
Contact me if you're interested in giving one a test run.